go godebug 源码
golang godebug 代码
文件路径：/src/internal/godebug/godebug.go
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package godebug parses the GODEBUG environment variable.
package godebug
import "os"
// Get returns the value for the provided GODEBUG key.
func Get(key string) string {
return get(os.Getenv("GODEBUG"), key)
}
// get returns the value part of key=value in s (a GODEBUG value).
func get(s, key string) string {
for i := 0; i < len(s)-len(key)-1; i++ {
if i > 0 && s[i-1] != ',' {
continue
}
afterKey := s[i+len(key):]
if afterKey[0] != '=' || s[i:i+len(key)] != key {
continue
}
val := afterKey[1:]
for i, b := range val {
if b == ',' {
return val[:i]
}
}
return val
}
return ""
}
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